ATHENS (Reuters) - Political resistance and potential court challenges are among "very large" risks to reforms required for Greece's bailout program, the country's European lenders said on Monday. The long-awaited report from the European Commission and the European Central Bank details the findings of the "troika" of the EC, ECB and the International Monetary Fund on Athens' efforts to meet targets under its 130-billion-euro ($170-billion) bailout. ...